/Engine/Plugins/Experimental/MeshModelingToolsetExp/Source/MeshModelingToolsExp/Public/CubeGridTool.h
Resets the grid position and orientation based on the actor in Grid Source Actor. This allows grid positions/orientations to be saved by pasting them into the transform of some actor that is later used, or by relying on the fact that the tool initializes transforms of newly created meshes based on the grid used.
ResetGridFromActor()